Whom does the Director leave at the Reservation?

In Chapter Six, the sight of Bernard's permit reminds the Director of a trip he took to the Reservation twenty years before. Lost in the memory, the Director, so conventional most of the time, commits a gross error by talking about the remote past. Despite his discomfort, Bernard listens, fascinated, as the Director describes taking the girl he was having a sexual relationship with at the time—a Beta-Minus—into the mountains, and then being overtaken by a storm while they slept. When the Director woke up, the girl was gone. A search later failed to find her. They assumed she'd fallen into a gully somewhere, or been eaten by a mountain lion. The Director shakes himself, says it could have happened to anyone, and of course, the social body persists though the component cells may change. Still, he dreams of it sometimes. The girl was Linda, John the Savage's mother.